
Chapter 5: Operation
5. Operation
5.1 LED Operation
Each L2 module features diagnostic LEDs that provide information on features and ports.
Upgrade LED Stacks
Upper | Function | State | 
FEF  | Fiber Far End Fault  | ON Green  | 
TXLL  | TX LinkLoss/Blink if Active  | ON Green  | 
LNK  | FiberLink is valid/Flash on Activity  | ON Green  | 
DIS | Software Disabled TX Port  | On Yellow  | 
Upper | Function | State | 
FA  | FiberAlert enabled/Blink Active  | ON Green  | 
FXLL  | FX LinkLoss/Blink if Active  | ON Green  | 
LNK  | FX LinkLoss is valid/Flash on Activity  | ON Green  | 
DIS  | Software Disabled fiber port  | On Yellow  | 
  | (via iView²)  | 
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